MWPowerPlantFacts

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PowerPlantFactsEvidence report · prepared 19 October 2026https://powerplantfacts.com/entity/3921
EIA plant 3921

Bridgeport · Douglas · WA

Chief Joseph

Operated by USACE Northwestern Division

Annual generation9,227,828 MWhSum of represented EIA-923 rows
Fuel codesWATCodes retained from EIA records
Grid contextBonneville Power AdministrationBalancing authority or NERC region

Published location

Where is Chief Joseph?

This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.

47.995100, -119.640400

Open the interactive map ↗

Map data © OpenStreetMap contributors

Capacity is not generation. Nameplate MW describes equipment; annual MWh describes recorded output. Proposed and retired units are not added to operating capacity.

Equipment mix

Operating capacity by technology

TechnologyConventional Hydroelectric2,456.2 MW represented

Grouped from this plant’s represented generator records. Use the WA plant index for regional peers.

See the evidence

Electricity output across the year

Monthly net generation shows the seasonal shape of this plant's represented output. A negative value is retained when the source reports net consumption.

1696,191
2529,143
3682,086
4659,694
5856,271
61,021,866
71,067,388
8915,311
9537,673
10536,789
11817,635
12907,781

MWh net generation · 2024 final edition · EIA 923 represented operating rows. 12 of 12 supplied rows shown; 0 missing values omitted. Months with no reported numeric value are omitted, not treated as zero.

Read the chart as a table
Electricity output across the year — MWh net generation
RecordMWh net generation
1696,191
2529,143
3682,086
4659,694
5856,271
61,021,866
71,067,388
8915,311
9537,673
10536,789
11817,635
12907,781

2024 monthly net generation

MonthNet generation
1696,191 MWh
2529,143 MWh
3682,086 MWh
4659,694 MWh
5856,271 MWh
61,021,866 MWh
71,067,388 MWh
8915,311 MWh
9537,673 MWh
10536,789 MWh
11817,635 MWh
12907,781 MWh

Operating generators

IDTechnologyFuelMWStatus
17Conventional HydroelectricWAT95OP
18Conventional HydroelectricWAT95OP
19Conventional HydroelectricWAT95OP
20Conventional HydroelectricWAT95OP
21Conventional HydroelectricWAT95OP
22Conventional HydroelectricWAT95OP
23Conventional HydroelectricWAT95OP
24Conventional HydroelectricWAT95OA
25Conventional HydroelectricWAT95OP
26Conventional HydroelectricWAT95OP
27Conventional HydroelectricWAT95OP
1Conventional HydroelectricWAT88.2OP
10Conventional HydroelectricWAT88.2OA
11Conventional HydroelectricWAT88.2OP
12Conventional HydroelectricWAT88.2OP
13Conventional HydroelectricWAT88.2OP
14Conventional HydroelectricWAT88.2OP
15Conventional HydroelectricWAT88.2OP
16Conventional HydroelectricWAT88.2OP
2Conventional HydroelectricWAT88.2OP
3Conventional HydroelectricWAT88.2OP
4Conventional HydroelectricWAT88.2OP
5Conventional HydroelectricWAT88.2OP
6Conventional HydroelectricWAT88.2OP
7Conventional HydroelectricWAT88.2OA
8Conventional HydroelectricWAT88.2OP
9Conventional HydroelectricWAT88.2OP

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Wells

Identity, technology and limitations
EIA plant ID
3921
Sector
Electric Utility
Water source
Columbia River
Data edition
2024-final

Use this record

Questions this evidence can answer

01What exactly is this record?

Use the name, place, date and identifiers above to confirm that you have the right Chief Joseph power plant: capacity and generation | PowerPlantFacts record.

02What does the evidence establish?

Read the reported values with their units, coverage dates and source notes. Keep observed facts separate from estimates or interpretation.

03What should I verify next?

Follow the primary-source links and check the limitations before using this evidence for a decision, comparison or citation.

A closer look at Chief Joseph

Variation in the published months

Across 12 numeric monthly generation entries, 7 has the highest recorded value (1,067,388 MWh) and 2 the lowest (529,143 MWh). Their difference is 538,245 MWh. Missing months have not been treated as zero.

Reading the MW column

In the 27 numeric rows displayed in this table, MW ranges from 88.2 (1, 10, 11) to 95 (17, 18, 19). The difference is 6.8 in the column's stated units. This summary covers the displayed rows and retains the table's period and scope.

Generator capacity in different operating conditions

Generator IDTechnologyNameplate MWSummer MWWinter MWMinimum load MW
1Conventional Hydroelectric88.288.288.247.6
10Conventional Hydroelectric88.288.288.247.6
11Conventional Hydroelectric88.288.288.247.6
12Conventional Hydroelectric88.288.288.247.6
13Conventional Hydroelectric88.288.288.247.6
14Conventional Hydroelectric88.288.288.247.6
15Conventional Hydroelectric88.288.288.247.6
16Conventional Hydroelectric88.288.288.247.6
17Conventional Hydroelectric95.095.095.095.0
18Conventional Hydroelectric95.095.095.095.0
19Conventional Hydroelectric95.095.095.095.0
2Conventional Hydroelectric88.288.288.247.6
20Conventional Hydroelectric95.095.095.095.0
21Conventional Hydroelectric95.095.095.095.0
22Conventional Hydroelectric95.095.095.095.0
23Conventional Hydroelectric95.095.095.095.0
24Conventional Hydroelectric95.095.095.095.0
25Conventional Hydroelectric95.095.095.095.0
26Conventional Hydroelectric95.095.095.095.0
27Conventional Hydroelectric95.095.095.095.0
3Conventional Hydroelectric88.288.288.247.6
4Conventional Hydroelectric88.288.288.247.6
5Conventional Hydroelectric88.288.288.247.6
6Conventional Hydroelectric88.288.288.247.6
7Conventional Hydroelectric88.288.288.247.6
8Conventional Hydroelectric88.288.288.247.6
9Conventional Hydroelectric88.288.288.247.6

EIA-860 2024 final source. Ratings describe capacity, not actual generation or availability. Missing ratings are not zero.

Source: US Energy Information Administration Form EIA-860 2024 plant and operable-generator workbooks; archive 2024. US EIA-authored information is generally public domain; cite EIA, preserve third-party exceptions, changes and no-endorsement context. Source-specific derived data.

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